My two starting MCs between them have more YCs than the rest of the team combined. They each played 18 competition matches. One has 4 YC, the other 5. No one else has more than 1 YC. The most active player has played 21 matches (0 YC), the next active -- 20 matches with 1 YC.

Is it the role (and my formation) that makes them get YCs, or is it programmed in each player how rough he is going to play?

The thing is, I remember my previous pair of MCs being in the same YC trouble and sitting out matches.